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Incorrect soil pH

Non-pathogenic (abiotic — soil pH imbalance)

12 host plants

Last updated

Data Coverage 4 of 6 dimensions
Causal Agent
Host Plants
Symptoms
Management
GDD Threshold
Regional Notes

Your blueberry shows stunted growth, interveinal leaf yellowing, and reduced yield. Soil pH outside the 4.5-5.5 range causes nutrient imbalances and iron deficiency. Plant in correct pH soil from the start. Monitor pH yearly; adjust with lime or sulfur as needed before planting. Use hydrangeas at field edges to monitor pH visually.

It is important to monitor and keep a record of soil pH on a yearly basis and take corrective actions if necessary. Plant hydrangeas at the end of blueberry rows to monitor soil pH.

Quick Reference

Causal Agent
Non-pathogenic (abiotic — soil pH imbalance)
Host Plants
12

Management

Cultural Controls

  • It is important to monitor and keep a record of soil pH on a yearly basis and take corrective actions if necessary.
  • Plant hydrangeas at the end of blueberry rows to monitor soil pH.
  • Many cultivars have blue flowers when soils are in the correct pH range.
  • Flowers turn purple to pink as the pH increases beyond the optimum range for blueberries.
  • Avoid white cultivars or ones that are bred to be pink all the time.
  • Locate new blueberry plantings on soil that is near or within the correct pH range of 4.5 to 5.5.
Regional Notes

In western Washington (west of the Cascade Range), native soil pH is typically acidic, which is naturally favorable for blueberry production. High pH problems are more likely east of the Cascades where agricultural lime from previous crops may persist.

Host Plants (12)